a = 'aa'
b = 'aa'
print(a is b)  # a 与 b为同一个对象
print(a == b)

a = ''' adsf 
adf asd
asdf 
adsf 
asdf '''
print(a)
print(a.find('f'))
print(a.count('a'))
c = '34era'
print(c.ljust(20, '*'))
print(c.rjust(20, "#"))
print(c.center(20, '%'))

s = 'wo shi {name},my age is {age},my money is {money:*^10}'.format(name='bei', age=20,money=32.453)
print(s)

name = 'sd'
age = 40
b = f'wo shi {name},my age is {age:*^7}'
print(b)
